
public class DragForce extends Force{
    private static final double COEFFICIEN_DRAGE = 0.01;
    public DragForce(Mass mass){
        Force massVelocity = mass.getVelocity(); 
        super.myMagnitude = getDragMagnitude(massVelocity);
        super.myAngle = massVelocity.getDirection() + 180;
    }
    public double getDragMagnitude (Force massVelocity) {
        return massVelocity.getMagnitude()
                * COEFFICIEN_DRAGE;
    }
}
